According to media reports, Zarif is visiting Lebanon as part of a regional tour that will also take him to Iraq, Jordan and Syria.

"If we receive an invitation without any preconditions, we will participate in the 'Geneva 2' peace conference, but we won't act in order to receive an invitation," Zarif said in Beirut.

UN Chief Ban Ki-moon last week sent invitations to 30 countries to attend the conference, but did not include Iran, the main regional backer of Syrian President Bashar al-Assad's regime.

Speaking in the Lebanese capital on Saturday, Zarif said Iran would ‘welcome any official meeting’ with Saudi Arabia, which supports opponents of Assad in the Syrian civil war.

"We try to have brotherly ties with this country. Because we believe that if our relationships strengthen, it will have a positive effect on the stability, security and peace in the entire region," he said.

The minister also welcomed Lebanon's efforts to stop ‘the main terrorist responsible’ for a bomb attack outside the Iranian embassy in Beirut that killed 25 people on November 19.

Majid al-Majid, a Saudi who was suspected to be the head of the Abdullah Azzam Brigades which claimed the attack, died in Lebanese custody this month.

The embassy attack came amid rising tensions in Lebanon over the role of the Iran-backed Shiite movement Hezbollah in the war in neighbouring Syria.